Applications of Organosilicon and Organoboron Compounds in Organic Semiconducting Materials
Organosilicon and organoboron derivatives are very important compounds in organic chemistry, and are widely used in organic synthesis, material chemistry and other related research areas. In particular, they have unique contributions toward the emerging research area of organic semiconducting materials. This paper summarized the applications of these two kinds of compounds in organic semiconducting materials.
Application of Graphene Quantum Dots(GQDs) in Biochemical Analysis
This paper introduced the latest researches on the application of graphene quantum dots (GQDs) in biochemical analysis, including biomolecules detection, metal ions detection, bacteria detection, cell imaging, tissue imaging and in vivo imaging.
Development of Innovative Talents of Chemistry
Student-Centered Classroom Teaching of Organic Chemistry
Example and Problem-Based Teaching Method of Physical Chemistry for Chemical Engineering
Question-Based Teaching of Inorganic Chemistry Theory
Improvement of Friedel-Crafts Acylation Reaction Experiment Applied for Preparation of p-tert-butylacetophenone
In the experiment teaching of basic organic chemistry, the preparation of acetophenone experiment generally use Friedel-Crafts acylation reaction with some problems such as buying acetic anhydride difficultly, not easy to save aluminum chloride catalyst, and so on. This paper improved the Friedel-Crafts acylation using concentrate sulfuric acid as catalyst, phosphorus pentoxide as dehydrating agent, acetic acid as acylating agent reacting with tert-butylbenzene, with molar ratio of 1:0.75:2:1, to prepare the p-tert-butylacetophenone which confirmed by 1HNMR and 13C NMR.This method not only has the advantages of mild reactive conditions,cheap raw materials and simple operation, but also can test students' understanding of positioning effect and hindrance effect of substitutents on aromatic compounds. In addition, vacuum distillation operation is conducive to develop students' experimental skills, and enrich experiment teaching contents.
Design of Novel Free Electrolyte Eelectrochemical Experiment on Single Electrode
Based on redox and primary battery theory, ZnO rods were prepared from Zn foil via a Pt-induced electrochemical process, where ZnO/Zn served as an anode and Pt/H2O/H2 served as a cathode. Zn could be transferred into ZnO rod array under the Pt-induced action. The samples were charactered by XRD, SEM and UV-vis absorption etc, which proved that ZnO rods were formed on the ZnO foil. The synthesis method could not only show the construction of redox couples, but also emphasize the import function of inert electrode in a primary battery. The operation of the novel experiment was very sample, and its phenomena were visual. The students can further understand redox theory through the novel experiment, which will stimulate students' enthusiasm for learning and innovation.
Preparation of Lamellar Ti/Si Composite Materials by Sol-Gel Method
This paper introduced the preparation of high ordered lamellar Ti/Si composite materials by sol-gel method using cationic surfactant CTAB as template, TEOS as silicon source, and TiCl3 as titanium source in hydrothermal system. The structure and morphology of the samples were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results showed that the products possessed high ordered microporous structure and homogeneous lamellar morphology with a dimension of around 10 nm, which provides favorable condition for its catalytic oxidation and establishes the theoretical foundation for the preparation of Ti/Si composite materials in the experiment teaching materials.
“Double-Track” Teaching Mode of Inorganic and Analytical Chemistry Experiment
In view of the problems existing in the traditional teaching practice, this paper explored "double-track" teaching mode of inorganic and analytical chemistry experiment, which combined in-class experiments with extracurricular practice. This study introduced the importance, general objectives and framework of this teaching mode, carried out the in-class experiment teaching reform by innovating teaching methods, optimizing teaching contents and advocating the concept of green chemistry, explored the extracurricular practice reform from teaching contents, teaching methods and organization mode, and optimized the "double-track" practice teaching evaluation system.
Improved Synthetic Route to Phenoxyacetic Acid in Preparation of 2,4-Dichlorophenoxyacetic Acid Experiment
During the preparation experiment of 2,4-dichlorophenoxyacetic acid, phenoxyacetic acid is prepared by Williamson recation with chloroacetic acid and phenol as materials under alkaline conditions based on the textbook. This method has led to the severe hydrolysis of chloroacetic acids and the oxidation of phenols in the experiment, which resulted in the poor quality and low yields of products. This paper improved this experiment as follow:chloroacetic acid was neutralized at 0℃; 1% of sodium hyposulfite as reductants was introduced; phenol first reacted with sodium hydroxide, then the such-prepared solution was added into sodium chloroacetate solution to react. Under the modified conditions, the quality of phenoxyacetic acid was improved and the yields could also increase to 95.2%.
Teaching Case Design of Flipped Classroom of Physical Chemistry Experiment Based on Micro-Lesson
According to the characteristics of physical chemistry experiment course, this paper proposed the experiment teaching process including micro-lesson followed by flipped classroom, experiment inquiry and combination of evaluation and discussion, and implemented this process in the determination of electric potential of galvanic battery.
Construction of Experiment Curriculum for Applied Chemistry Based on Development of Students' Scientific Research and Innovation Ability
Penetrative Cultivation of Pre-Service Chemistry Teachers' Classroom Teaching Skills
In view of the problems such as single pathway and limited class hours of classroom teaching skills training of normal students in chemical education, the viewpoint of the penetrative cultivation in the elective courses of chemical education majors was proposed. Through theoretical analysis and practical exploration, it was found that this training mode could not only improve the training effect, but also improve the teaching quality of some elective courses.
Order-Oriented Personnel Training Mode for Applied Chemical Technology Major Based on College-Enterprise Cooperation
This paper discussed the development of order-oriented personnel training mode for applied chemical technology major based on college-enterprise agreement, social requirements and vocational students' characteristics, including personnel training objectives, curriculum system and teaching contents, implementation of training programs, and assessment.
Exploration and Practice of SCL Teaching Method in Chemistry Course of Secondary Vocational Health Professional School
Combining with the teaching of osmotic pressure of solution, this paper illustrated the application of SCL teaching method in chemistry course of secondary vocational health professional school. The process included setting context, introducing new lesson,using group activities to start a new knowledge and expanding students thinking capacity in practical applications. Results showed that SCL teaching method made classroom atmosphere exciting and changed students' learning habits.
Teaching Practice of Inquiry Learning in Course of Fine Chemical
Inquiry learning was practiced in the course of fine chemical on the subject of food additives and food safety. Oriented on the interests of students, subjects were selected to be discrete from the central subject and collaborative study was carried out. Aimed at the cultivation of the learning ability of students, focus was put on the learning process and multi evaluation methods were incorporated. Aspects need to be improved during inquiry learning were discussed. Practice showed it was effective to arouse the learning interest of students, cultivate the students' exploratory ability and comprehensive quality.
Undergraduate Major Construction of Chemical Engineering and Technology
According to the target location of running school of shanghai institute of technology, our school of chemical and environmental engineering presented the applied talents building concept for the major of chemical engineering and technology. The reform programs designed in terms of personnel training program, curriculum construction and teaching methods, teaching management system, and teaching staff. The preliminary exploration of these reform programs have been done.
Strategies for Effectively Searching and Using Chemical Information
Internet is more and more popular, so how to rapidly get and effectively apply valuable literatures and information become more and more important. Based on experiences on research and teaching, this paper summarized strategies for effectively searching and using chemical information, and discussed how to retrieve, collect, sort, filter and read chemical literatures and information, and suggested the sorting, filtering and reading methods are also discussed, in order to help college students and graduates to write review papers before scientific research and technological development.
Discussion on Flame Color of Sulfur Combustion Reactions
Burning is a complex process of physics and chemistry. This paper discussed sulfur combustion reaction under difference condition showed different colors, and the influencing factors of the chain redox reactions, such as the reaction species, reaction condition, etc.